<template>
  <div class="cart">
    <Header/>
    <div class="cart-info">
      <h3 class="cart-top">购物车结算 <span>共{{course_list.length}}门课程</span></h3>
      <div class="cart-title">
        <el-row>
          <el-col :span="2">&nbsp;</el-col>
          <el-col :span="10">课程</el-col>
          <el-col :span="8">有效期</el-col>
          <el-col :span="4">价格</el-col>
        </el-row>
      </div>
      <div class="cart-item" v-for="course in course_list">
        <el-row>
          <el-col :span="2" class="checkbox">&nbsp;&nbsp;</el-col>
          <el-col :span="10" class="course-info">
            <img :src="course.course_img" alt="">
            <span class="course_name">{{course.name}}<br><span class="discount">{{course.discount_name}}</span></span>
          </el-col>
          <el-col :span="8"><span>{{course.expire_text}}</span></el-col>
          <el-col :span="4" class="course-price">
            <span class="real_price">¥{{course.real_price}}</span><br>
            <span class="original_price">原价¥{{course.original_price}}</span>
          </el-col>
        </el-row>
      </div>
      <!--      优惠券-->
      <div class="discount">
        <div id="accordion">
          <div class="coupon-box">
            <div class="icon-box">
              <span class="select-coupon">使用优惠劵：</span>
              <a class="select-icon unselect" :class="use_coupon?'is_selected':''" @click="use_coupon=!use_coupon"><img
                class="sign is_show_select" src="../../static/image/12.png" alt=""></a>
              <span class="coupon-num">有{{coupon_list.length}}张可用</span>
            </div>
            <p class="sum-price-wrap">商品总金额：<span class="sum-price">¥{{total_price}}元</span></p>
          </div>
          <div id="collapseOne" v-if="use_coupon">
            <ul class="coupon-list" v-if="coupon_list.length>0">
              <li class="coupon-item " :class="selected_coupon(key, item.id)"
                  v-for="(item,key) in coupon_list" @click="click_select_coupon(key, item.id)">
                <p class="coupon-name">{{item.coupon.name}}</p>
                <p class="coupon-condition" v-if="item.coupon.condition>0">满{{item.coupon.condition}}元可以使用</p>
                <p class="coupon-time start_time">开始时间：{{item.start_time.replace("T", " ")}}</p>
                <p class="coupon-time end_time">过期时间：{{item.end_time}}</p>
              </li>

            </ul>
            <div class="no-coupon" v-if="coupon_list.length<1">
              <span class="no-coupon-tips">暂无可用优惠券</span>
            </div>
          </div>
        </div>
        <div class="credit-box">
          <label class="my_el_check_box">
            <el-checkbox class="my_el_checkbox" v-model="use_credit"></el-checkbox>
          </label>
          <p class="discount-num1" v-if="!use_credit">使用我的贝里</p>
          <p class="discount-num2" v-else>
            <span>总积分：{{user_credit}}，已抵扣
              <el-input-number @change="handleChange" v-model="credit" :min="0" :max="max_credit()" label="请填写积分">

              </el-input-number>，本次花费{{credit}}积分, 剩余{{parseInt(user_credit-credit)}}积分</span></p>
        </div>
        <!--        <p class="sun-coupon-num">优惠券抵扣：<span>0.00元</span></p>-->
      </div>

      <div class="calc">
        <el-row class="pay-row">
          <el-col :span="4" class="pay-col"><span class="pay-text">支付方式：</span></el-col>
          <el-col :span="8">
            <span class="alipay" v-if="pay_type==0"><img src="../../static/image/alipay2.png" alt=""></span>
            <span class="alipay" @click="pay_type=0" v-else><img src="../../static/image/alipay.png" alt=""></span>
            <span class="alipay wechat" v-if="pay_type==1"><img src="../../static/image/wechat2.png" alt=""></span>
            <span class="alipay wechat" @click="pay_type=1" v-else><img src="../../static/image/wechat.png"
                                                                        alt=""></span>
          </el-col>
          <el-col :span="8" class="count">实付款： <span>¥{{(real_total - credit/credit_to_money ).toFixed(2)}}</span>
          </el-col>
          <el-col :span="4" class="cart-pay"><span @click="payHander">支付宝支付</span></el-col>
        </el-row>
      </div>
    </div>
    <Footer/>
  </div>
</template>

<script>
    import Header from "./common/Header"
    import Footer from "./common/Footer"

    export default {
        name: "Order",
        data() {
            return {
                pay_type: 0, // 支付类型
                credit: 0, // 积分
                coupon: 0, // 优惠券id
                coupon_list: [], // 优惠券列表
                use_credit: false, // 是否使用了积分
                use_coupon: false, // 是否使用了优惠券
                course_list: [], // 勾选的课程列表
                total_price: 0, // 结算总价格
                real_total: 0, // 经过优惠券折算或者积分折算后的总价格
                user_credit: localStorage.user_credit || sessionStorage.user_credit,
                credit_to_money: localStorage.credit_to_money || sessionStorage.credit_to_money,
            }
        },
        components: {
            Header,
            Footer,
        },
        created() {
            this.token = this.check_user_login();
            this.get_cart();
            this.get_coupon();
        },
        watch: {
            coupon() {
                this.credit = 0;
                this.calc_real_total();
            },
            use_coupon() {
                if (this.use_coupon === false) {
                    this.coupon = 0;
                    this.real_total = this.total_price;
                }
            }
        },
        methods: {
            check_user_login() {
                let token = localStorage.user_token || sessionStorage.user_token;
                if (!token) {
                    let self = this;
                    this.$confirm("对不起,您尚未登录! 所以请登录再使用购物车", "路飞学城", {
                        confirmButtonText: "确定",
                        cancelButtonText: "取消",
                        type: "warning"
                    }).then(() => {
                        self.$router.push("/user/login");
                    });
                    return false; // 阻止js继续往下执行
                }
                return token;
            },
            get_cart() {
                // 获取购物车中要结算的商品列表
                this.$axios.get(`${this.$settings.HOST}/cart/order`, {
                    headers: {
                        "Authorization": "jwt " + this.token,
                    }
                }).then(response => {
                    this.course_list = response.data.course_list;
                    this.total_price = response.data.total_price;
                    this.real_total = response.data.total_price;
                    console.log(666, this.course_list);
                }).catch(error => {
                    console.log(111);
                    this.$message.error("对不起,当前购物车没有任何商品被勾选88!");
                })

            },
            get_coupon() {
                // 获取当前用户拥有的优惠券
                this.$axios.get(`${this.$settings.HOST}/coupon/`, {
                    headers: {
                        "Authorization": "jwt " + this.token,
                    }
                }).then(response => {

                    this.coupon_list = response.data;
                    console.log(222, this.coupon_list)
                }).catch(error => {
                    console.log(333);
                    this.$message.error("对不起,当前购物车没有任何商品被勾选99!");
                })
            },
            selected_coupon(key, user_coupon_id) {
                // 当选中优惠券时, 切换优惠券的高亮显示效果
                let user_coupon = this.coupon_list[key];
                console.log(988, user_coupon);
                // 判断总价格是否满足优惠券的使用
                if (this.total_price < user_coupon.coupon.condition) {
                    return "disable";
                }
                // 判断优惠券是否处于使用时间范围内
                let start_timestamp = parseInt(new Date(user_coupon.start_time) / 1000);
                let end_timestamp = parseInt(new Date(user_coupon.end_time) / 1000);
                let now_timestamp = parseInt(new Date() / 1000);
                if ((now_timestamp < start_timestamp) || (now_timestamp > end_timestamp)) {
                    return "disable";
                }
                if (this.coupon === user_coupon_id) {
                    return "active";
                }
                return "";
            },
            click_select_coupon(key, user_coupon_id) {
                // 点击切换优惠券时记录本次点击的优惠券
                let user_coupon = this.coupon_list[key];
                if (this.total_price < user_coupon.coupon.condition) {
                    return false;
                }
                let start_timestamp = parseInt(new Date(user_coupon.start_time) / 1000);
                let end_timestamp = parseInt(new Date(user_coupon.end_timestamp) / 1000);
                let now_timestamp = parseInt(new Date() / 1000);
                if ((now_timestamp < start_timestamp) || (now_timestamp > end_timestamp)) {
                    return false;
                }
                this.coupon = user_coupon_id;
            },
            payHander() {
                // 生成订单
                this.$axios.post(`${this.$settings.HOST}/order/`, {
                    pay_type: this.pay_type, // 支付方式
                    credit: this.credit, // 积分
                    coupon: this.coupon, //  优惠券Id
                }, {
                    headers: {
                        "Authorization": "jwt " + this.token,
                    }

                }).then(response => {
                    // 订单生成成功!
                    this.$message.success("订单生成成功! 即将跳转到支付页面");
                    // 发起支付[页面跳转, 后端需要提供跳转地址]
                    this.$axios.get(`${this.$settings.HOST}/payments/alipay/`, {
                        params: {
                            order_number: response.data.order_number,
                        }
                    }).then(response => {
                        // 返回支付链接地址
                        location.href = response.data;
                    }).catch(error => {
                        this.$message.error(error.response.data.message);
                    })

                }).catch(error => {
                    this.$message.error("订单生成失败!")
                })
            },
            calc_real_total() {
                this.coupon_list.forEach((item) => {
                    // 选出当前选中的那一张优惠券
                    if (item.id === this.coupon) {
                        let start_timestamp = parseInt(new Date(item.start_time) / 1000);
                        let end_timestamp = parseInt(new Date(item.end_time) / 1000);
                        let now_timestamp = parseInt(new Date() / 1000);
                        // 选出当前可以使用的优惠券
                        if ((this.total_price > item.coupon.condition) && (now_timestamp > start_timestamp) &&
                            (now_timestamp < end_timestamp)) {
                            // 获取优惠公式
                            let f = parseFloat(item.coupon.sale.substr(1));
                            // 根据优惠公式计算最终折算后的总价格
                            if (item.coupon.sale[0] === "*") {
                                // 折扣优惠
                                this.real_total = this.total_price * f;
                            } else {
                                // 减免优惠
                                this.real_total = this.total_price - f;
                            }
                        }
                    }
                });
            },
            max_credit() {
                // 计算本次订单中, 用户可以设置的最大积分
                // 用户拥有的积分允许抵扣的最大金额
                console.log(this.user_credit, this.credit_to_money);
                let max_credit_to_money = this.user_credit / this.credit_to_money;
                console.log("用户积分抵扣", max_credit_to_money);
                // 计算当前真实的订单实付金额
                let ret = 0;
                if (max_credit_to_money > this.real_total) {
                    ret = parseInt(this.real_total * this.credit_to_money);
                } else {
                    ret = parseInt(this.user_credit);
                }
                console.log(ret);
                return ret;
            },
            handleChange(value) {
                if (!value) {
                    this.credit = 0;
                }
            }
        }
    }
</script>

<style scoped>
  .cart {
    margin-top: 80px;
  }

  .cart-info {
    overflow: hidden;
    width: 1200px;
    margin: auto;
  }

  .cart-top {
    font-size: 18px;
    color: #666;
    margin: 25px 0;
    font-weight: normal;
  }

  .cart-top span {
    font-size: 12px;
    color: #d0d0d0;
    display: inline-block;
  }

  .cart-title {
    background: #F7F7F7;
    height: 70px;
  }

  .calc {
    margin-top: 25px;
    margin-bottom: 40px;
  }

  .calc .count {
    text-align: right;
    margin-right: 10px;
    vertical-align: middle;
  }

  .calc .count span {
    font-size: 36px;
    color: #333;
  }

  .calc .cart-pay {
    margin-top: 5px;
    width: 110px;
    height: 38px;
    outline: none;
    border: none;
    color: #fff;
    line-height: 38px;
    background: #ffc210;
    border-radius: 4px;
    font-size: 16px;
    text-align: center;
    cursor: pointer;
  }

  .cart-item {
    height: 120px;
    line-height: 120px;
    margin-bottom: 30px;
  }

  .course-info img {
    width: 175px;
    height: 115px;
    margin-right: 35px;
    vertical-align: middle;
  }

  .alipay {
    display: inline-block;
    height: 48px;
  }

  .alipay img {
    height: 100%;
    width: auto;
  }

  .pay-text {
    display: block;
    text-align: right;
    height: 100%;
    line-height: 100%;
    vertical-align: middle;
    margin-top: 20px;
  }

  .course_name, .real_price, .original_price {
    display: inline-block;
    line-height: 140%;
  }

  .course_name .discount {
    color: #ffc210;
  }

  .original_price {
    color: #9b9b9b;
    text-decoration: line-through;
  }

  .course-price {
    margin-top: 33px;
    line-height: 32px;
  }

  /*优惠券*/
  .coupon-box {
    text-align: left;
    padding-bottom: 22px;
    padding-left: 30px;
    border-bottom: 1px solid #e8e8e8;
  }

  .coupon-box::after {
    content: "";
    display: block;
    clear: both;
  }

  .icon-box {
    float: left;
  }

  .icon-box .select-coupon {
    float: left;
    color: #666;
    font-size: 16px;
  }

  .icon-box::after {
    content: "";
    clear: both;
    display: block;
  }

  .select-icon {
    width: 20px;
    height: 20px;
    float: left;
  }

  .select-icon img {
    max-height: 100%;
    max-width: 100%;
    margin-top: 2px;
    transform: rotate(-90deg);
    transition: transform .5s;
  }

  .is_show_select {
    transform: rotate(0deg) !important;
  }

  .coupon-num {
    height: 22px;
    line-height: 22px;
    padding: 0 5px;
    text-align: center;
    font-size: 12px;
    float: left;
    color: #fff;
    letter-spacing: .27px;
    background: #fa6240;
    border-radius: 2px;
    margin-left: 20px;
  }

  .sum-price-wrap {
    float: right;
    font-size: 16px;
    color: #4a4a4a;
    margin-right: 45px;
  }

  .sum-price-wrap .sum-price {
    font-size: 18px;
    color: #fa6240;
  }

  .no-coupon {
    text-align: center;
    width: 100%;
    padding: 50px 0px;
    align-items: center;
    justify-content: center; /* 文本两端对其 */
    border-bottom: 1px solid rgb(232, 232, 232);
  }

  .no-coupon-tips {
    font-size: 16px;
    color: #9b9b9b;
  }

  .credit-box {
    height: 30px;
    margin-top: 40px;
    display: flex;
    align-items: center;
    justify-content: flex-end
  }

  .my_el_check_box {
    position: relative;
  }

  .my_el_checkbox {
    margin-right: 10px;
    width: 16px;
    height: 16px;
  }

  .discount {
    overflow: hidden;
  }

  .discount-num1 {
    color: #9b9b9b;
    font-size: 16px;
    margin-right: 45px;
  }

  .discount-num2 {
    margin-right: 45px;
    font-size: 16px;
    color: #4a4a4a;
  }

  .sun-coupon-num {
    margin-right: 45px;
    margin-bottom: 43px;
    margin-top: 40px;
    font-size: 16px;
    color: #4a4a4a;
    display: inline-block;
    float: right;
  }

  .sun-coupon-num span {
    font-size: 18px;
    color: #fa6240;
  }

  .coupon-list {
    margin: 20px 0;
  }

  .coupon-list::after {
    display: block;
    content: "";
    clear: both;
  }

  .coupon-item {
    float: left;
    margin: 15px 8px;
    width: 220px;
    height: 150px;
    padding: 5px;
    background-color: #fa3030;
    cursor: pointer;
  }

  .coupon-list .active {
    background-color: #fa9000;
  }

  .coupon-list .disable {
    cursor: not-allowed;
    background-color: #fa6060;
  }

  .coupon-condition {
    font-size: 12px;
    text-align: center;
    color: #fff;
  }

  .coupon-name {
    color: #fff;
    font-size: 24px;
    text-align: center;
  }

  .coupon-time {
    text-align: left;
    color: #fff;
    font-size: 12px;
  }

  .unselect {
    margin-left: 0px;
    transform: rotate(-90deg);
  }

  .is_selected {
    transform: rotate(-1turn) !important;
  }
</style>
